Vacuum-brake.



YJ. T. DIGKSON.

VACUUM BRAKE.

APIPLIOATION FILED AUGJ, 1912.

Patented oct. 21, `1913.

--Janms lt 'mcxsoim or LosfaNGEnE'sieALrroiaNrA.

fg State fo'f Californiz't",y havel invented new an'd =`-us`e1l Improvements -in' VacuumBrakes,gV of `Whichthe following is a specification.

vp'riwidef'a` brake actuated by vacuum, 'adapt'-A f edor automobiles -a-nd like uses; and it comprisesfalmechanism operatively connected-tle" the-'intakef manifold of an internalp lcombusti'onenginqat any suitable point be-' inderafsthat thesuetion ereatdby the ene' "ployfed'f brak-ihglfpurposes. i y 'i *My invention-1in .'t's most-` approved formf. fis set" =forth in' the." 'following specification; taken 4|'in' connection yWith the 'accompanying' drawings, in which; `1."Figure 1 is a general Ielevation showing'- jthe"a'p'plication of" my device to an auto;

.mobile Fig. 2 is a detail section of a three" "'Way suction controlling valve. Fig. 3 is a detail' showing ajmethod ofoperating thef brake band.` f 1`n"thedrwings 5 designates the engine of any typical automobile, 6 the intake maniLl fold and 7 th'ecarbureter connected thereto. .On the steering post 8 I have shown a suitable lever 9 operating throttle 15 through connecting' rods. 10, 11 and .12, and bell cranks 13v and'lfl located at a convenient'- al; p'omt on the vehicle; a. horizontallydisposed cl linder 16,- openat one end and having t erein a. pist0nf'17, suitably packed; this piston havmg. a: link connection as at "18, which extends out asuitable distance and is l .provided at its outer end with a slotted way 19 for the pur ose of attaching thereto the lower end of oot lever 20, the attachment bein preferably by Vmeans of a cross pin 21 whic permits the lever to slideback and 5 Aforth to the extent of the slotted Wa 19,

allowing. thefbot lever 2O to be use for braking'. purposes at the option of the op erator and without aHecting the piston. Above the pivotipoint 220i the footlever 5o 20 is the :connecting rod 23 which `extends to brake Brake 24'may be operable in any common manner;v I have shown an ar rangement in Fig. 3 wherebythe 'movement Vof rod .23 in the direction Vindicated vwill close .the brake band 24* on the drum 24".

The `manifold 6 is connected with the head y Vfof the cylinder 16 by means of a pipe 25,

land in the-line of the pipe at any suitable fpolnt 1s a" three way valve 26 the stem of .Y the valve having arms 27 and 28. To the arm 28- is-hinged' a 'manually loperable rod 29, wherebythfe operator may be able to valve and-thus control the passage fo'ffj'su'ction. 'through'- the pipe. The

spring returnsfthefvalve to 'a closed positionyadmittin" air'I-to' the -cylinder 16 Which in turn re easesthebrake. Through the rod 31 the arm 27i`sc0nnected With the throttle valve operatingmeans at 32. The "end f' the rod 31`i's provided with a slotted "-way 331top`e'rmit the operation of the valve 26` through theope'rating rod 29 Without aifecting themovement ct' the throttle valve 1521 *Either xf' these; valve operating means may be usedfto' the exclusion of the other. Being 't'hus' connected' u'p it is obvious that when it is desired t'o` `lslovv, down the engine and the throttle isclosedfeither artially or Wholly*,"'there`-Will be 'produceda a' partial vacuumiin" the-intakepipe 6 and in pipe 2 5."The`t` "pening 'of valve 26 will cause suiiicient. Vacuum to act on'piston 17 in cylin- 'der.16- 'to move the piston 17 and thereby1 operate the foot lever 20 and this in turn 4actuat'es*the brake through the. brake rod 11.V Thevalve 262 will rotate through ap- "prximately'iquarter'rotation to make a 4clear passage through pipe 25; a position intermediatethis and the one illustrated will cui off all connection of 'cylinder 16 through pipe 25 and Will hold a vacuum in the cylinder. The pressure exerted on piston 17 will depend upon the extent to which the engine is throttled. If the engine is running at hi h speed and is suddenly i as the braking action has taken place and the valve 26 cuts oli the suction from the manifold the piston will still hold the brake in contact, until the.V stem of the valve is so turned as to cause air to fill the space behind the piston. This method of operation is easily done through the valve operating rod 29. However it will b'e understood that the apparatus is at least operative without. valve control in the pipe 25. -When the engine is running under normal conditions Specification of Letters Patent. I Patented Oct. 1913. application mea Aug'ust '1, 1912. serial No. 713,896.

l with the throttle wholly or widely lopen,"

there is a very slight vacuum created in thel intake; and, consequently, there would .-be very little pressure tendingto move the piston 17. But when the engine is throttled 'down the vacuum pressure, due to the engine V g suction, increases and will move the piston v to apply the brakeat the same time the engine slows down. The primary function of when' wanted, and not levery time the engine feed is cut off..-

Having described my inventin, I claim;` 1. Incombination, an internalicombustion engine having a throttle controlled intake pipe, a brake applied to a mechanism driven by the engine, a vacuum cylindema piston therein, anda pipe connection betweeny the manifold and cylinder. A

2. In combination, an .internal combustion engine having a throttle controlled intake Hereby enters this disclaimer to that.

which to wit manifold, a brake applied' to a part rotated by the engine, a vacuum cylinder,alpiston therein and operatively connected to the brake, and a pipe connection between the manifold and cylinder provided with a manually opera-ble three way valve for controiling the connection of the cylinder to the manifold or to atmosphere.

I 3. In combination, an internal combustion engine having a throttle controlled intake manifold, a brake for the engine, a vacuum cylinder, a piston therein, a foot leverconnected, with the brake and attached to the vpiston with a'limited 'sliding movement with respect thereto, and suction connection'be# tween the cylinderl and the intake manifoldbetween the throttle and engine.

. 4. In combination, an internal combustion DISQLAI M QR", a," Los'jAn eles, Calif.- n l Disclaimer led June 10, 1930, by the assignee, lBragg- "ieiigine, an intake manifold, a throttle valve therefor, a brake for the engine,a vacuum cylinder anda piston therein connected with the brake, a pipe connection between the cylinder and manifold at a point between the throttle and engine, a three way valve in :said pipe,` and mechanical connections 'between the engine throttle valve and the three .way valve. 1 5he-valvej26 '(when'the Vfoot operation, is I usd) is to provide for applying the brake 5. In combination, an internal combustion enginehaving a throttle controlled intake, abrake operating upon the engine, vacuum operable mea-nsvfor actuating thebrake, and

point between the engine and throttle, and manually o erable means controlling passage'of fini through said connection.

7. In combination, an internal combustion engine having a throttle n controlled intake,

a brake for the engine, vacuum operable means for actuatingthe'brake, connection I between said means and 'the intake at a point betweenthe engine and throttle, a valve in said connection and manually operable means whereb the throttle and valve may be simultaneous y o erated.

In witness that I claim the foregoing I have hereunto subscribed my name this 19th d :E J l 1912. ay o u y JAMES T. DICKSON. 1 Witnesses: t

ELwoon H. BARKELEW, L. CONNOR.

vylI.;ciiiUivi'iB-naires. Patent apart .of the claim in said specification appears as claims numbered 1, 3 an 5, and which are in the following Words,

1. In combination, an internal combustion en 'ne having a throttle controlled` intake pipe, a brake applied to a mechanism driven y the engine, a vacuum cylinder, a piston therein, and a pipe connection between the manifold and cylinder,

3. In combination, an internal combustion engine having a throttle controlled intake manifold, a brake for the engine, a vacuum cylinder, a piston therein, a foot lever connected with the brake and attached to the piston with a limited sliding Inovement with respect thereto, and suction'connection between the cylinder and-the intake manifold between the throttle and engine.

5. In combination, an internal combustion engine having a throttle controlled 'Y intake, a brake operating upon the engine, vacuum operable means for actuating the brake, and connectiony between said means and the intake at a point between the engine and throttle.

[Oficial Gazette July 1, 1930] l with the throttle wholly or widely lopen,"

there is a very slight vacuum created in thel intake; and, consequently, there would .-be very little pressure tendingto move the piston 17. But when the engine is throttled 'down the vacuum pressure, due to the engine V g suction, increases and will move the piston v to apply the brakeat the same time the engine slows down. The primary function of when' wanted, and not levery time the engine feed is cut off..-

Having described my inventin, I claim;` 1. Incombination, an internalicombustion engine having a throttle controlled intake pipe, a brake applied to a mechanism driven by the engine, a vacuum cylindema piston therein, anda pipe connection betweeny the manifold and cylinder. A

2. In combination, an internal combustion engine having a throttle controlled intake Hereby enters this disclaimer to that.

which to wit manifold, a brake applied' to a part rotated by the engine, a vacuum cylinder,alpiston therein and operatively connected to the brake, and a pipe connection between the manifold and cylinder provided with a manually opera-ble three way valve for controiling the connection of the cylinder to the manifold or to atmosphere.

I 3. In combination, an internal combustion engine having a throttle controlled intake manifold, a brake for the engine, a vacuum cylinder, a piston therein, a foot leverconnected, with the brake and attached to the vpiston with a'limited 'sliding movement with respect thereto, and suction connection'be# tween the cylinderl and the intake manifoldbetween the throttle and engine.

. 4. In combination, an internal combustion DISQLAI M QR", a," Los'jAn eles, Calif.- n l Disclaimer led June 10, 1930, by the assignee, lBragg- "ieiigine, an intake manifold, a throttle valve therefor, a brake for the engine,a vacuum cylinder anda piston therein connected with the brake, a pipe connection between the cylinder and manifold at a point between the throttle and engine, a three way valve in :said pipe,` and mechanical connections 'between the engine throttle valve and the three .way valve. 1 5he-valvej26 '(when'the Vfoot operation, is I usd) is to provide for applying the brake 5. In combination, an internal combustion enginehaving a throttle controlled intake, abrake operating upon the engine, vacuum operable mea-nsvfor actuating thebrake, and

point between the engine and throttle, and manually o erable means controlling passage'of fini through said connection.

7. In combination, an internal combustion engine having a throttle n controlled intake,

a brake for the engine, vacuum operable means for actuatingthe'brake, connection between said means and 'the intake at a point betweenthe engine and throttle, a valve in said connection and manually operable means whereb the throttle and valve may be simultaneous y o erated.

In witness that I claim the foregoing I have hereunto subscribed my name this 19th d :E J l 1912. ay o u y JAMES T. DICKSON. 1 Witnesses: t

ELwoon H. BARKELEW, L. CONNOR.

vylI.;ciiiUivi'iB-naires. Patent apart .of the claim in said specification appears as claims numbered 1, 3 an 5, and which are in the following Words,

1. In combination, an internal combustion en 'ne having a throttle controlled` intake pipe, a brake applied to a mechanism driven y the engine, a vacuum cylinder, a piston therein, and a pipe connection between the manifold and cylinder,

3. In combination, an internal combustion engine having a throttle controlled intake manifold, a brake for the engine, a vacuum cylinder, a piston therein, a foot lever connected with the brake and attached to the piston with a limited sliding Inovement with respect thereto, and suction'connection between the cylinder and-the intake manifold between the throttle and engine.

5. In combination, an internal combustion engine having a throttle controlled 'Y intake, a brake operating upon the engine, vacuum operable means for actuating the brake, and connectiony between said means and the intake at a point between the engine and throttle.

[Oficial Gazette July 1, 1930] 

